St. Augustine's record-setting narrow street was designed to protect against pirates.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.

The last of Fairfax County's one-room schoolhouses.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

Scattered around Atlanta are little doors with big charm.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

A psychedelic tribute to one of Georgia's most unique artistic visionaries, out of place and time in the heart of Atlanta.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

Family-run for more than a century, this pizzeria makes a unique mustard pie.

This sound-art installation features songs composed using only the Mid-Hudson Bridge as an instrument.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

The real-life site of Ichabod Crane's infamous gourd attack.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

A trompe-l'oeil statue honoring the first guide dog in North America.

One of the oldest of its kind.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones’ locker.

The 28-foot granite map plots the locations of 40 theaters in New York City.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Elevated freight railway turned wildly successful urban park.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.